Update .gitignore note

Author: kdeldycke

.claude/skills/repomatic-audit/SKILL.md

@@ -90,7 +90,7 @@ Compare these files against the upstream reference. **Before flagging absence as
 | `.github/ISSUE_TEMPLATE/`             | Filename conventions (hyphens, not underscores), missing labels                                                   | Personal/internal repo without external bug reporters.                                |
 | `.github/code-of-conduct.md`          | Title-case headings vs upstream sentence case, plaintext email vs anti-scrape obfuscation, stale attribution URLs | Replace verbatim with upstream when divergence is detected.                           |
 | `.github/funding.yml`                 | Compare with reference                                                                                            | —                                                                                     |
-| `.gitignore`                          | Symlink target (often `dotfiles/.gitignore_global` or similar) vs upstream                                        | Auto-generated by repomatic; drift means the user should re-run sync.                 |
+| `.gitignore`                          | Must be a real file: git skips an in-tree `.gitignore` reached via symlink; otherwise content vs upstream         | Auto-generated by repomatic; drift means the user should re-run sync.                 |
 | `lychee.toml`                         | Note differences (usually project-specific, just flag for review)                                                 | Project doesn't run lychee.                                                           |
 
 **Skip** files that are intentionally excluded via `exclude` in `[tool.repomatic]`. Cross-check `[tool.ruff] extend-exclude` and similar before flagging "missing" entries.